-LRB- CNN -RRB- -- Top seed and defending champion Serena Williams charged into her sixth Wimbledon final where she will play Russian Vera Zvonareva on Saturday .

Williams ended the dreams of unseeded Czech Petra Kvitova with a 7-6 6-2 victory in their semifinal on Centre Court on Friday .

Earlier , Zvonareva came from a set down to beat another unseeded player , Bulgarian Tsvetana Pironkova , 3-6 6-3 6-2 .

Williams was extended by Kvitova in a near hour-long first set , which saw both exchange breaks before going into a tiebreak .

The world number one raced into a 4-0 lead before Kvitova fought back and it needed a strong service winner from Williams to close it out 7-5 .

Williams broke the left-hander in the fifth game of the second set and extended her advantage in the penultimate game .

But that was not before Kvitova had won the rally of the match , a 19-stroke thriller , to save a break point .

But Williams eventually took the game to go up a double break and served out for the match .

Only Zvonareva stands between her and a fourth Wimbledon title to add to her victory in the Australian Open earlier this year .

But the tournament favorite is still wary of the challenge of her talented opponent .

`` I 've had some unbelievable matches against her , she 's really tough , '' she told BBC Sport .

The 25-year-old Zvonareva reached her first grand slam final after seeing off Pirinkova , who beat Venus Williams in the quarterfinals .

`` I have n't quite realized what I 've done yet , '' Zvonareva told AFP .

`` It is very exciting . It 's one of my dreams to be in the final . ''

The turning point of their match came in the sixth game of the second set as Zvonareva made the breakthrough on Pirinkova 's service and went on to level at a set all .

A break in the very first game of the decider put Zvonoreva on top and she broke again as Pirinkova missed a forehand .

But she will need to be at her best in Saturday 's showpiece as Williams bids for her 13th grand slam singles title .

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Serena Williams to take on Vera Zvonareva in women 's singles final at Wimbledon

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Top seed Williams beats unseeded Czech Petra Kvitova 7-6 6-2

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21st seed Zvonareva of Russia saw off Bulgarian outside Tsvetana Pironkova in three sets